白背楠 bai bei nan

Trees, to 30 m tall. Branchlets slightly compressed, longitudinally striate, densely gray or gray-brown pubescent. Petiole thick, 1-2.5 cm, densely gray pubescent; leaf blade abaxially ± glaucous, adaxially shiny, obovate or obovate-lanceolate, 10-18 × 3.5-8 cm, leathery, abaxially densely or sparsely pubescent, adaxially glabrous except for hairs along midrib, midrib thick, abaxially raised, adaxially concave or plane, lateral veins 7-9 pairs, anastomosing near margin, veinlets numerous, only abaxially distinct, base attenuate or cuneate, apex acute or acuminate. Panicles arising from base of newly sprouted branchlet, 6-16 cm, densely gray pubescent. Pedicel ca. 5 mm. Perianth lobes ovate, unequal, 2.5-3.5 × ca. 2 mm, densely pubescent on both surfaces, apex mucronate. Filaments glabrous except for hairs at base, those of 3rd series with shortly stipitate glands at base. Staminode filaments villous. Ovary glabrous. Infructescences densely gray pubescent, with few fruits. Fruit ovoid, ca. 10 × 5 mm; fruiting pedicel 3-4 mm, densely pubescent; persistent perianth lobes ovate, leathery, gray pubescent on both surfaces, conspicuously unequal, outer ones smaller than inner ones. Fl. May, fr. Oct.

● Mixed mountain forests. SE Xizang (Mêdog), C Yunnan (Xinping).